Modify linux-arm scripts for new toolchain (crosstools-ng) ; gluegen-cpptasks-linux-armv6hf.xml: Enable cc-arg '-mfloat-abi=hard' ; Add script make*all.sh
Fix Bug 650: Use toolchain default arch & float options for default arm cc/ld target in make/gluegen-cpptasks-base.xml

Specialized arch & float arm options are defined in
    - lib/gluegen-cpptasks-linux-armv6.xml   (armv5te + softfp), or
    - lib/gluegen-cpptasks-linux-armv6hf.xml (armv6   + hardfp)